Newborns are very sensitive to sound. Because after birth, newborns have very good hearing development and are more sensitive to hearing. In particular, they are more sensitive to abnormal sounds, such as hearing violent or unfamiliar sounds, and often have a startle reflex, or may cry violently. Based on the above factors, when caring for a newborn, try not to let it be frightened. Keep the surroundings relatively quiet, especially do not suddenly shout or let them hear sounds that are not often heard. The newborn’s hearing is sensitive, so parents should pay attention to care in order to promote the further development of hearing.